Want to test fire an LT1 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68C10HotRod · 04-28-2009, 11:47 AM

Really need some advice & help from the LT1 swappers out there.

I've got an LT1/T56 ('96 Camaro SS) that has been sitting long enough that I'd like to test fire & run before committing to a swap. All parts were included when I got this a few years ago (alt, ps, ac, maf, harness, puter, all sensors on motor & trans) - so I'm hoping this shouldn't be too tough.

What's the least (cheapest) I can get away with to run this until warmup?

- Radiator & hoses
- Fans
- Fuel tank, pump & lines
- Battery & ign switch
- Stand to run on
- Harness - can I hookup power, ign & fans only? (besides motor & maf)
- VATS - how can I work around this?
- General advice on firing a motor that's been sitting

OR, is this even a good idea??

Please LMK your opinions. TIA.

6772owner · 04-28-2009, 12:24 PM

Well I never tried to run mine until it was in the truck, but I would say that you should be able to fire it up if you have the full harness hooked up to the improtant things at least. You can bypass the VATS, this diagram should help you. You have to have the fan relays in, even if not hooked up, you have to keep the air pump relay hooked up and I think the fuel pump relay as well. Mine had been sitting for a few years and it fired right up the first try (well after I put the fuse in I was missing LOL) I would say just fresh oil, gas and plugs. I have heard that some injectors can get clogged with fuel sitting in them (similiar to a carb) but I didnt have any issues.

Anything I didnt answer??? I would say just swap it in, I love mine and wouldnt go back now, well maybe to a LQ4/9 or LS2 LOL

faribran · 04-28-2009, 01:22 PM

that sounds like a nice setup....keep us updated on the progress.

Bus Ted Knuckle · 04-28-2009, 01:25 PM

IF you know it was good when you set it up, I'd replace the rear main seal, and the valve seals, then install it and run it. Bearings, etc. don't go bad unless it has been kept in water, or exposed to salt air, etc. The rest of the seals you can get to easily enough to change if needed after install.

Shon · 04-28-2009, 01:29 PM

if you just want to test fire it you do not have to run water, granted it need not run more than 5 sec but we do this sometimes when replacing the opti, fire it up just to be sure it works.

VATS will have to be turned off or a bypass installed.

04-28-2009, 11:47 AM	#1
68C10HotRod Registered User Join Date: Feb 2008 Location: Omaha, NE 68144 Posts: 333	Want to test fire an LT1 Really need some advice & help from the LT1 swappers out there. I've got an LT1/T56 ('96 Camaro SS) that has been sitting long enough that I'd like to test fire & run before committing to a swap. All parts were included when I got this a few years ago (alt, ps, ac, maf, harness, puter, all sensors on motor & trans) - so I'm hoping this shouldn't be too tough. What's the least (cheapest) I can get away with to run this until warmup? - Radiator & hoses - Fans - Fuel tank, pump & lines - Battery & ign switch - Stand to run on - Harness - can I hookup power, ign & fans only? (besides motor & maf) - VATS - how can I work around this? - General advice on firing a motor that's been sitting OR, is this even a good idea?? Please LMK your opinions. TIA. __________________ Bryan '52 Bel Air 2dr HT - in pieces '68 C10 - 6cyl/4spd REMOVED, LT1/T56 to be installed “Any society that would give up a little liberty to gain a little security will deserve neither and lose both.” - Benjamin Franklin "And those who know what's best for us, Must rise and save us from ourselves" - RUSH lyric (mockery)

04-28-2009, 12:24 PM	#2
6772owner Gearhead Join Date: Jan 2008 Location: Colorado Posts: 1,193	Re: Want to test fire an LT1 Well I never tried to run mine until it was in the truck, but I would say that you should be able to fire it up if you have the full harness hooked up to the improtant things at least. You can bypass the VATS, this diagram should help you. You have to have the fan relays in, even if not hooked up, you have to keep the air pump relay hooked up and I think the fuel pump relay as well. Mine had been sitting for a few years and it fired right up the first try (well after I put the fuse in I was missing LOL) I would say just fresh oil, gas and plugs. I have heard that some injectors can get clogged with fuel sitting in them (similiar to a carb) but I didnt have any issues. Anything I didnt answer??? I would say just swap it in, I love mine and wouldnt go back now, well maybe to a LQ4/9 or LS2 LOL __________________ 2002 Saturn SL2, My D/D 2019 Ford Fusion SE, Ecoboost - Wife's D/D 1993 Camaro Z28, A4, CAI, Cat-Back Exhaust Project C10 (my 72' C10 w/96' LT1, 700R4, bagged F&R, 18's (for now), Short/Fleet) -- SOLD! Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=313644

04-28-2009, 01:22 PM	#3
faribran Registered User Join Date: Jul 2005 Location: AL Posts: 1,828	Re: Want to test fire an LT1 that sounds like a nice setup....keep us updated on the progress. __________________ "

04-28-2009, 01:25 PM	#4
Bus Ted Knuckle Son of a gun Join Date: Jan 2007 Location: Hot Springs, Arkansas Posts: 1,636	Re: Want to test fire an LT1 IF you know it was good when you set it up, I'd replace the rear main seal, and the valve seals, then install it and run it. Bearings, etc. don't go bad unless it has been kept in water, or exposed to salt air, etc. The rest of the seals you can get to easily enough to change if needed after install. __________________ Bill BEATERS ARE NEATER

04-28-2009, 01:29 PM	#5
Shon Registered User Join Date: Sep 2005 Location: sc Posts: 1,203	Re: Want to test fire an LT1 if you just want to test fire it you do not have to run water, granted it need not run more than 5 sec but we do this sometimes when replacing the opti, fire it up just to be sure it works. VATS will have to be turned off or a bypass installed.



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